This traditionally handmade PI paper is made of mulberry tree* fibers for crafting and brush painting. Thin thickness, it is semi-absorbent but does not smear that much as a good brush painting paper. We would recommend this beautiful paper to sumi-e students and all watercolorists to collect and give it a try. It is very strong and hard-wearing could be used for wet mounting, lamp cover and other paper crafting material. *Mulberry tree leaves are the sole food source of the silkworms. Difference between our Mulberry #1 and #2: #2 comes with long strands of kozo fiber(or visible veins); #1 without long fiber.